public class Application{
  public static void main(String args[]){
   Pillar pillar;
   Geometry bottom = null;
  pillar = new Pillar (bottom,100);
  System.out.println("体积"+pillar.getVolume());
  bottom=new Rectangle(12,22);
  pillar = new Pillar(bottom,58);
  System.out.println("体积"+pillar.getVolume());
  bottom= new Circle(10);
  pillar = new Pillar(bottom,58);
  System.out.println("体积"+pillar.getVolume());
  }
}

